Highly active cobalt phosphate and borate based oxygen evolving catalysts operating in neutral and natural waters
- 2 December 2010
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Energy & Environmental Science
- Vol. 4 (2), 499-504
- https://doi.org/10.1039/c0ee00518e
Abstract
A high surface area electrode is functionalized with cobalt-based oxygen evolving catalysts (Co-OEC = electrodeposited from pH 7 phosphate, Pi, pH 8.5 methylphosphonate, MePi, and pH 9.2 borate electrolyte, Bi). Co-OEC prepared from MePi and operated in Pi and Bi achieves a current density of 100 mA cm−2 for water oxidation at 442 and 363 mV overpotential, respectively. The catalyst retains activity in near-neutral pH buffered electrolyte in natural waters such as those from the Charles River (Cambridge, MA) and seawater (Woods Hole, MA). The efficacy and ease of operation of anodes functionalized with Co-OEC at appreciable current density together with its ability to operate in near neutral pH buffered natural water sources bodes well for the translation of this catalyst to a viable renewable energy storage technology.Keywords
This publication has 27 references indexed in Scilit:
- Nickel-borate oxygen-evolving catalyst that functions under benign conditionsProceedings of the National Academy of Sciences, 2010
- Chemistry of Personalized Solar EnergyInorganic Chemistry, 2009
- Electrolyte-Dependent Electrosynthesis and Activity of Cobalt-Based Water Oxidation CatalystsJournal of the American Chemical Society, 2009
- Preparation and evaluation of RuO2–IrO2, IrO2–Pt and IrO2–Ta2O5 catalysts for the oxygen evolution reaction in an SPE electrolyzerJournal of Applied Electrochemistry, 2008
- In Situ Formation of an Oxygen-Evolving Catalyst in Neutral Water Containing Phosphate and Co 2+Science, 2008
- Light, Water, HydrogenPublished by Springer Science and Business Media LLC ,2008
- Powering the planet: Chemical challenges in solar energy utilizationProceedings of the National Academy of Sciences, 2006
- Hydrogen production by advanced proton exchange membrane (PEM) water electrolysers—Reduced energy consumption by improved electrocatalysisEnergy, 2006
- Sol-gel derived spinel MxCo3−xO4 (M=Ni, Cu; 0≤x≤1) films and oxygen evolutionElectrochimica Acta, 2000
- Electrocatalysis in the anodic evolution of oxygen and chlorineElectrochimica Acta, 1984